Missing something aligment

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8 comments

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    Götz Echtenacher

    Hi Enrique,

    is the person turning in front of the camera? On a turntable??  ::-)

    Anyway, please don't take that personally but there is about everything as bad as it can get for photogrammetry.

    Starting with the one camera-approach for living objects, it is never ideal.

    Next are the images, all that I cecked were slightly or extremely blurry, the object covers far too little of the frame and is on top of that on the fringes. It should be in the middle because the optics are best there.

    Followed by the materials. Hair is extremely difficult. Black is bad. Shiny black is impossible.

    If you want decent results you need: a rig, higher resolution or more shots, crisper images, object covering at least 80% of the frame.

    There is quite some good advice spread out here in the forum and loads more out there...

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    Enrique Castillo

    Thanks so much Götz Echtenacher, appreciate your advices, thanks very much.

    Is on turntable, 6 cameras vertically, 1 turn=27 photos each camera,  i can turn slower to get more pictures.

    few days ago  did this one and it works:

    https://www.dropbox.com/sh/232iq3s8popycec/AACVHPJZ1CTOgbo-Ha3yDn9wa?dl=0

     

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    Götz Echtenacher

    Hi Enrique,

    is the table turning during the exposure?

    All the problems that I pointed out about the "object" are much better with the second example. No black, good texture, the hair is smooth as opposed to the very curly hair in the first example.

    I would still suggest to adjust the cameras at the top and bottom to cover more of the person and the images could be a lot sharper.

    What I forgot last time is that because of the bad circumstances RC found more tie points on the background which has probably contributed to the breaking up into components.

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    Massimo Tasso

    Hi,

    I'm not using a turntable but a full 360° scanner. Like enrique I also found a very noticeable degradation of reconstruction quality since the last upgrade. Now the reconstructions span from useless to bearly acceptable, where before they were superb.

    I'm wondering if they did change something to the algorithms or to the presets.

    kr

    Massimo

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    Massimo Tasso

    no, I was wrong. Reconstructions are still fine, however I noticed that if I replace a photoset (delete the directory and replace it with new photos) RC messes up. Aligns and recontructs the previous set, even after closing the application.

    It maybe even makes a merge of old and new sets of photos, which leads to the "useless" reconstruction which I was talking in my previous comment.

    Using a new folder name for a new photoset removes the problem.

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    Enrique Castillo

    thanks Götz Echtenacher,

    In this case the cameras are turning.

    I will do  more photos per turning, and taking all the pros a cons you said me,

    thanks so much

    regards,

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    ShadowTail

    You can do the replacing only for texturing (if you have, for example, two sets of photos - one with projected pattern - one without).

    But in any case the image files must have exactly the same file name for each image and the images must be in exactly the same order.

     

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    Götz Echtenacher

    Hi Massimo,

    glad you spotted the error.

    It can happen sometimes that something goes wrong in the database of a project file, especially when re-naming and/or moving images is involved. If you start fresh in a new project, everything should be back to normal...

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